NHR is operating at each site 3 central storage systems with their global file systems:
| File System | Capacity | Storage Technology and Function |
|---|---|---|
| HOME | 340 TiB | IBM Spectrum Scale file system, exported via NFS to compute and login nodes
|
| WORK | Lise: 10 PiB Emmy: 8 PiB | DDN ExaScaler with Lustre parallel file system |
| PERM | Tape archive with multiple petabyte capacity with additional harddisk caches |
The system Emmy has additional storage options for high IO demands:
- Phase 1 nodes (partitions
medium40andlarge40): Local SSD All nodes of the partitionstandard96:ssd have local SSDs for temporary data at$LOCAL_TMPDIR(400 GiB shared among all jobs running on the node). The environment variable$LOCAL_TMPDIRis available on all nodes, but on the phase 2 systems it points to a ramdisk2 TB per node). For more details refer to Special Filesystems.
LIFETIME
In general, we store all data for an extra year after the end of a test account/project. If not extended, the standard term of test account/project is one year.
HOME
Each user holds one HOMR directory on each compute site Emmy and Lise.HOME directory:
- directory
HOME=/home/${USER} - for a higher number of files
- configuration files
- source code and executables
- limited disk space
- backup is available
...